CN1205798A - Load switch for step switch - Google Patents
Load switch for step switch Download PDFInfo
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- CN1205798A CN1205798A CN 96199190 CN96199190A CN1205798A CN 1205798 A CN1205798 A CN 1205798A CN 96199190 CN96199190 CN 96199190 CN 96199190 A CN96199190 A CN 96199190A CN 1205798 A CN1205798 A CN 1205798A
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- main contacts
- switch
- load transition
- lasting
- lasting main
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Abstract
The invention relates to a load switch for a step switch, permanent main contact pairs which effect wattless switching being provided for each phase to be switched. In the fixed state, one of the permanent contact pairs is closed and conducts the constant current. To control the mobile permanent contacts in each of the permanent contact pairs, it is proposed that a cam disk with a control cam for each phase to be switched should be fitted on a switching shaft. A roller engages with each of these control cams and acts on the appropriate mobile permanent main contact via mechanical coupling elements.
Description
The present invention relates to the load transition switch that the described step switch that is used for the stepping adjustable transformer of a kind of preamble by first Patent right requirement has the lasting main contacts of idle connection.
By DE-PS 2747489 known a kind of like this load transition switches.
This known load transition switch respectively has auxiliary contact to right with main contacts to each phase that will connect, and they are handled when each load transition successively.In addition, it has two lasting main contactss right to what each will be connected mutually, a contact is wherein always arranged to passing through steady-state current at stationary state.The cylindrical structural of the load transition switch designs that this is known; Its housing is made of some cylindrical shells, and fixing main contacts and auxiliary contact are housed on it.Be fan in inside and arrange relevant movable main contacts and auxiliary contact, they are handled by a center switch axle.Respectively be provided with the steady-state current main contacts or the lasting main contacts of idle connection in parallel with the main contacts circuit, wherein movable lasting main contacts is hinged on the movable main contacts and is handled with it.Known by DE-AS 1930719 in addition, the lasting main contacts that is hinged on the movable main contacts of respectively attaching troops to a unit can and pass through spring damping around pin revolution.
In known load transition switch, as top explanation already, movable lasting main contacts moves with the movable main contacts of attaching troops to a unit.Yet a kind of like this load transition switch only is applicable to switch or the switching programme that realizes having symmetrical process in principle, that is to say, wherein with the switch direction and thereby with switch shaft irrelevant to rotation direction ground, between the manipulation of the main contacts and the lasting main contacts of respectively attaching troops to a unit, exist fixing in time relation.In other words, in a kind of switch of symmetry, when reverser, the main contacts of all existence and auxiliary contact also all will be handled by opposite order.
But also known so-called non-symmetrical switch is for example seen DE 42 23 439 and WO95/24724, and they have the advantage of electric aspect, and especially share very much in the time should using vacuum switch as switch element.In these asymmetrical switches, the sequence of motion of each main contacts and auxiliary contact remains constant; For example in by WO 95/24724 in the known switch, along each switch direction main contacts that at first moves, auxiliary contact move subsequently.Yet, at the lasting main contacts of stationary state by load current, must be in all cases, even in non-symmetrical switch, as of the at the beginning disconnection of first contact in each load transition, and as last contact closure when each load transition finishes.That is to say that it is symmetrical that the manipulation that continues main contacts in this switch still keeps, yet the manipulation of main contacts and auxiliary contact is asymmetric.This is explanation just, has the known load transition switch that its lasting main contacts mechanically is connected on the main contacts why and is not suitable for use in this switch.
Therefore the purpose of this invention is to provide a kind of load transition switch by this type, wherein, on the one hand the manipulation of main contacts and auxiliary contact and on the other hand the manipulation of lasting main contacts separately carry out.
This purpose reaches by the load transition switch with first Patent right requirement feature.Dependent claims relates to the particularly advantageous further improvement of the present invention.
Major advantage of the present invention is, with the switching sequence of main contacts and location independent at that time, can directly continue main contacts by the switch shaft independent manipulation.
Establish crooked groove though be known as the load transition switch, insert in the groove and handle the pin that rolls that the contact uses by DE-AS 1930719.But these grooves are the rotatable and parts of switch fan-shaped section movably, and the member that the latter is designed to separate is separately handled main contacts and auxiliary contact by these grooves, continue main contacts and fail helpful for separately handling in this scheme.
By DE-OS 1,805 378 known a kind of change over switches by double plate control, double plate has the upper curve groove and turns to the lower curve groove of upper curve groove in addition, and both physical dimensions are inconsistent.The guiding mutually of these two curved grooves only just superimposed mutually at their end points with staggering in this known solutions.In addition, last dish is provided with lock portion, in order to lock, and it and a lockplate ear cooperating.Between last dish and lower wall a pivot pin that is provided with two rollers is arranged, the latter is arranged to it and can inserts in the upper curve groove and can insert in the lower curve groove again.Handle an impedance conversion switch but this is designed for, its root joint is connected with transfer resistance.This scheme does not have help for separately handling lasting main contacts yet.In addition, the co-operating of two kinds of different curved groove necessity causes the expense expenditure of expensive configuration aspects.
Illustrate in greater detail the present invention by means of accompanying drawing as example below.
In the accompanying drawing:
Fig. 1 has wherein only represented lasting main contacts and their mechanism of manipulation by load transition switch signal top view in cross-section of the present invention;
This load transition switch of Fig. 2 is similarly the cross-sectional side elevational view of signal;
Fig. 3 is only with the part of the cam of a control curved groove;
The diagrammatic top view of this load transition switch of Fig. 4 a and 4b in the embodiment of three-phase wherein represented two kinds of connection possibility, that is the lasting main contacts of fixing in the pattern of three-phase is two kinds of phase place U, V and W possible positions.
Be contained in the inside of insulative cylinders body 1 by load transition switch of the present invention, the heart is provided with a vertically extending switch shaft 3 therein, and it rotates the angle [alpha] of a regulation in the known manner along both direction by an accumulator that not have an expression when each load transition.The fixing lasting main contacts 2,16 that extends inward is housed on insulative cylinders body 1.On this external switch shaft 3 cam 4 is housed securely, it has a control curved groove 5 at each phase place that will handle.Roller 8 is inserted in the control curved groove 5.Play the supporting 15 of two other member simultaneously at the pivot pin of roller 8 central authorities, therefore these two members are connected to each other in motion: be connected with the free end of rocking bar 6 on the one hand, rocking bar 6 can be around supporting 7 swings, free end with lever 9 is connected on the other hand, and lever 9 rotatably is fixed in another supporting 12 again.Supporting 12 is located at again on the movable lasting main contacts 10.This movable lasting main contacts 10 is designed to it and can supports 11 swings and two contact-making surfaces 10.1 and 10.2 are arranged around another, when swing they one of two terminal locations respectively with one of two fixing lasting main contactss 2,16 closing of contact.Center (neutral position) at movable lasting main contacts 10 is then opposite, and any closing of contact does not take place.Do not represent the supply of electric current here to movable lasting main contacts 10.Main contacts and the auxiliary contact of equally also not representing the load transition switch.
Fig. 3 has represented control curved groove 5 in detail.As can be seen, the shape in middle district has been described a concentric circular orbit basically, and they increase with respect to the radial distance of switch shaft 3 in end region.Wherein, end position is with corresponding two of stationary state possible positions.
Should describe work below in detail by load transition switch of the present invention.If start the load transition switch, then switch shaft 3 begins rotation, for example counterclockwise.Therefore cam 4 also rotates; The roller 8 of being guided to the shape sealing in control curved groove 5 impels rocking bar 6 around supporting 7 swings.This causes lever 9 motions, and therefore movable lasting main contacts 10 is around supporting 11 swing and the heart positions that are placed in one.This movable lasting main contacts 10 has left fixing lasting main contacts 16 up to the present and has moved on to neutral center.When switch shaft 3 continues rotation, press the main contacts and the auxiliary contact that do not have expression in the switch condition official hour order control diagram, this movable lasting main contacts 10 remains on the center during this period.In the incoming terminal position not long ago, because the guiding of shape sealing causes the change of roller 8 relative positions in control curved groove 5, make rocking bar 6 swing once more, lever 9 move again and makes movable lasting main contacts 10 lean against on another lasting main contacts 2 of fixing and accept electric current; Therefore load transition finishes.
On cam 4, also be provided with left backstop 13 and right backstop 14, their position is chosen as with respect to lever 9, they depend on that direction ground always keeps off on the side at lever 9 when cam 4 rotation, and thereby monodrome ground book it gyratory directions at that time and thereby the direction of motion of given movable lasting main contacts 10 as preferred orientations.Guarantee thus, roller 8 from the center always alternately capture that terminal location on control curved groove 5 opposites, and thereby movable lasting main contacts 10 is always alternately connected back and forth between fixing lasting main contacts 2 and 16.
Such as already described, the total that continues main contacts that is used to handle of expression and explanation is at a phase place among Fig. 1 to 3.In the scheme of the common three-phase of load transition switch, be shaped on three control curved grooves 5 that its shape is identical on the cam 4, on the reference circle of switch shaft 3, arranged three complete structures that are used to handle lasting main contacts separately at one.
Fig. 4 a and 4b represent the signal top view in cross-section of this three-stage structure respectively.Their difference is that the circuit of the lasting main contacts fixed arranges.
Each movable lasting main contacts is attached troops to a unit in phase place U, a V, W in Fig. 4 a, that is to say, its terminal location it always with two of a phase place fixing lasting main contacts U
A, U
BAnd V
A, V
BAnd W
A, W
BOne of the closing of contact.Two of each phase place fixing lasting main contactss are attached troops to a unit in two different movable lasting main contactss in Fig. 4 b.Any scheme of final selection will be arranged and load transition switch general structure type according to voltage ratio, circuit; For the work of load transition switch is described, the selection that relevant circuit is arranged does not have any significance.
Claims (5)
1. the load transition switch used of step switch is wherein, right to the continuation main contacts that each phase place that will connect all has idle ground electricity to connect; Each lasting main contacts is to forming with a movable lasting main contacts of fixing by one; In each phase place that will connect, always there are one of two lasting main contacts centerings closed and flow through steady-state current at stationary state, make load transition to disconnect that the lasting main contacts flow through steady-state current so far at the beginning right, another lasting main contacts that closure disconnects so far when each load transition finishes to and accept steady-state current; And, be provided with a switch shaft that extends in central authorities in load transition switch inside, it can alternately when load transition each time along the angle of a regulation of both direction rotation, it is characterized by: be provided with a cam (4) on switch shaft (3), it has a control curved groove (5) at each phase place that will connect; And, in each control curved groove (5), insert a roller (8), it acts on the lasting main contacts (10) of a motion by means of the coupling joint of machinery, and this lasting main contacts can be swung according to the shape of control curved groove (5).
2. according to Patent right requirement 1 described load transition switch, it is characterized by: the coupling joint of machinery is made up of rocking bar (6) and lever (9), make rocking bar (6) also hinged except that following roller (8) motion with a free end of lever (9) with an one free end, lever can rotate around a supporting (12), props up to be housed on the movable lasting main contacts (19).
3. according to Patent right requirement 1 or 2 described load transition switches, it is characterized by: movable lasting main contacts (10) can be around center swing, it is abutted in when each of two terminal locations on the corresponding fixing lasting main contacts (16), and hereinto any closing of contact does not take place during heart position.
4. according to the described load transition switch of one of all Patent right requirements in prostatitis, it is characterized by: control curved groove (5) shape depict basically in middle district one with the concentric circuit orbit of switch shaft (3), and in the end position district change its radial distance with respect to switch shaft (3).
5. according to the described load transition switch of one of all Patent right requirements in prostatitis, it is characterized by: be provided with left backstop (13) and right backstop (14) on cam (4), they are defined as privileged direction according to direction with one of (10) two possible directions of motion in movable lasting contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96199190 CN1205798A (en) | 1995-12-21 | 1996-12-05 | Load switch for step switch |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19547873.8 | 1995-12-21 | ||
| CN 96199190 CN1205798A (en) | 1995-12-21 | 1996-12-05 | Load switch for step switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1205798A true CN1205798A (en) | 1999-01-20 |
Family
ID=5129363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96199190 Pending CN1205798A (en) | 1995-12-21 | 1996-12-05 | Load switch for step switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1205798A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101326602B (en) * | 2005-12-09 | 2011-10-26 | Abb研究有限公司 | A device for transmitting rotary motion and application thereof |
| CN102893359A (en) * | 2010-04-15 | 2013-01-23 | 赖茵豪森机械制造公司 | Mechanical switch contact |
| CN102893357A (en) * | 2010-05-11 | 2013-01-23 | 赖茵豪森机械制造公司 | Load transfer switch for a tap changer |
-
1996
- 1996-12-05 CN CN 96199190 patent/CN1205798A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101326602B (en) * | 2005-12-09 | 2011-10-26 | Abb研究有限公司 | A device for transmitting rotary motion and application thereof |
| CN102893359A (en) * | 2010-04-15 | 2013-01-23 | 赖茵豪森机械制造公司 | Mechanical switch contact |
| CN102893359B (en) * | 2010-04-15 | 2015-08-05 | 赖茵豪森机械制造公司 | Mechanical switch contact |
| CN102893357A (en) * | 2010-05-11 | 2013-01-23 | 赖茵豪森机械制造公司 | Load transfer switch for a tap changer |
| CN102893357B (en) * | 2010-05-11 | 2015-07-08 | 赖茵豪森机械制造公司 | Load transfer switch for a tap changer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |